Kensington K72213USA Mouse-in-a-Box Optical 2 USB Mouse (PC/Mac) (72213) DiamondEye optical technology responds to your fastest movements with accurate tracking and unmatched acceleration guidance Features 2 mouse buttons and a scroll wheel to speed through long documents or Web pages Connects via USB and is guaranteed to work right out of the box on both PCs and Macs Backed by a five-year manufacturer's warranty and free technical support Ergonomically designed to be comfortable for both right- and left-handed users